Ionic Carbides

Morris, David R.

doi:10.1007/978-1-4757-1724-2_7

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…The current for deposition of carbon from dissolved CaC2 at 850~ was almost independent of stirring in the lower voltage range, while it increased at more positive potentials (7). At higher temperatures (~ 1000~ the current increased with stirring also in the lower potential range (9). These results indicate a shift from reaction control to diffusion control with increasing potential and temperature.…”

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confidence: 75%

On the Solubility of Aluminum Carbide and Electrodeposition of Carbon in Cryolitic Melts

O̸degaård¹,

Sterten²,

Thonstad³

1987

J. Electrochem. Soc.

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The solubility of aluminum carbide in cryolitic melts was determined as a function of the following parameters: (i) normalNaF/AlF3 molar ratio false(CRfalse) of normalNaF‐AlF3 melts at 1020°C, (ii) temperature of normalNaF‐AlF3 melts at CR=1.80 , (iii) alumina concentration at CR=1.80 normaland 1020°C , and (iv) CaF2 concentration of normalNaF‐AlF3‐CaF2 melts at CR=1.80 normaland 1020°C . At 1020°C, a maximum concentration of 2.1 weight percent aluminum carbide was found at CR=1.80 . The following model for the aluminum carbide dissolution reaction, based on activity data for normalNaF and AlF3 , was found to fit the experimental solubility dataAl4C3)(normals+5AlF3 )(normaldiss+9normalNaF)(l=3Al3CF83−+9Na+Carbon could be electrodeposited from normalNaF‐AlF3 melts saturated with aluminum carbide by electrochemical oxidation of the dissolved carbide species. Voluminous deposits of amorphous carbon were obtained on several different electrode substrates (graphite, vitreous carbon, iron, tungsten, and platinum).

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confidence: 75%